Heating unfreezing device for liquefied natural gas pipeline

Abstract

The utility model relates to the field of heating unfreezing devices, and discloses a heating unfreezing device of a liquefied natural gas pipeline, which comprises a conveying pipe, a valve is fixedly connected to the surface of the conveying pipe, a steam heating component is arranged on the surface of the conveying pipe, and a wind heating component is arranged at the top of the conveying pipe. The steam heating assembly comprises a water tank fixedly arranged at the top of the conveying pipe, the side wall of the water tank is fixedly connected with a water pump, the output end of the water pump is fixedly connected with a water outlet pipe, at least one spraying head is arranged on the surface of the water outlet pipe, the top of the water tank is fixedly connected with a sewer pipe, and the top of the sewer pipe is fixedly connected with a water seepage filter screen. The surface of the water seepage filter screen is fixedly connected with a heat preservation cavity, and the interior of the water tank is fixedly connected with a heating wire. According to the utility model, through the structural arrangement of the heating wire, the water tank, the water outlet pipe and the spraying head in the steam heating assembly, the problems that local overheating or incomplete unfreezing of partial areas is easily caused, and the energy consumption is relatively high are solved.

Description

Technical Field

[0001] This utility model relates to the field of heating and thawing devices, and more particularly to a heating and thawing device for liquefied natural gas pipelines. Background Technology

[0002] As a clean and efficient energy source, liquefied natural gas (LNG) is increasingly widely used in the global energy sector. Due to the low-temperature characteristics of LNG, it is prone to icing inside pipelines during pipeline transportation when the external ambient temperature changes, the pipeline insulation performance decreases, or the gas pressure inside the pipeline fluctuates. The formation of ice not only reduces the pipeline's flow cross-sectional area, increases gas transportation resistance, and reduces transportation efficiency, but in severe cases, it may even cause pipeline blockage, paralyzing the entire transportation system and affecting the stable supply of energy, resulting in huge economic losses to related industries and users.

[0003] The existing heating and defrosting devices for liquefied natural gas pipelines use electric heating wires wrapped around the outside of the pipeline for heating and defrosting. The heat generated by the resistance wires is transferred to the insulating material and metal foil on the outer layer of the heating wires in close contact with it through heat conduction. The metal foils distribute the heat evenly and transfer it to the surface of the pipeline. Then, the heat is transferred from the heating wires to the outer wall of the pipeline, causing the pipeline temperature to rise.

[0004] However, while existing heating and defrosting devices for liquefied natural gas (LNG) pipelines are simple and easy to implement, they suffer from uneven heating, which can easily lead to local overheating or incomplete defrosting in some areas, and they also consume a lot of energy. Therefore, a heating and defrosting device for LNG pipelines is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a heating and defrosting device for liquefied natural gas pipelines, which aims to improve the problems of uneven heating in the prior art, which can easily lead to local overheating or incomplete defrosting in some areas, as well as high energy consumption.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heating and defrosting device for a liquefied natural gas pipeline, comprising a conveying pipe, a valve fixedly connected to the surface of the conveying pipe, a steam heating component disposed on the surface of the conveying pipe, a wind-heating component disposed at the top of the conveying pipe, the steam heating component comprising a water tank fixedly disposed at the top of the conveying pipe, a water pump fixedly connected to the side wall of the water tank, a water outlet pipe fixedly connected to the output end of the water pump, at least one spray head disposed on the surface of the water outlet pipe, a drain pipe fixedly connected to the top of the water tank, a seepage filter fixedly connected to the top of the drain pipe, a heat insulation cavity fixedly connected to the surface of the seepage filter, and a heating wire fixedly connected inside the water tank;

[0007] As a further description of the above technical solution: the air-heating component includes a mounting cavity fixedly connected to the top of the insulation cavity, a motor fixedly connected inside the mounting cavity, a fan fixedly connected to the output end of the motor, a heating mesh provided at the bottom of the fan, and an air outlet opened on the surface of the insulation cavity;

[0008] As a further description of the above technical solution: the water pump penetrates the side wall of the water tank, and the water outlet pipe is fixedly connected to the side wall of the water tank;

[0009] As a further description of the above technical solution: the drain pipe passes through the insulation cavity and is fixedly connected to the bottom of the insulation cavity, and an insulation film is provided inside the insulation cavity;

[0010] As a further description of the above technical solution: the water outlet pipe penetrates through both side walls of the insulation cavity and is fixedly connected inside the insulation cavity;

[0011] As a further description of the above technical solution: the plurality of spray heads are located directly below the delivery pipe, and the spray heads are located inside the insulation cavity;

[0012] As a further description of the above technical solution: the heating mesh is fixedly connected inside the mounting cavity;

[0013] As a further description of the above technical solution: the heat insulation cavity is fixedly connected to the surface of the conveying pipe.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, through the structural arrangement of the heating wire, water tank, water outlet pipe and spray head in the steam heating component, the water in the water tank is heated and then pumped into the water outlet pipe by the water pump. Then it is sprayed onto the surface of the delivery pipe through the spray head to heat and thaw the delivery pipe. Finally, the used water is returned to the water tank through the seepage filter and the drain pipe for reuse. This solves the problems of easy local overheating or incomplete thawing in some areas and high energy consumption.

[0016] 2. In this utility model, by setting up a fan and a heating grid in the air-heating component, the motor drives the fan to blow hot air onto the heated grid, so that the hot air reaches the surface of the conveying pipe, heating and thawing the conveying pipe. Finally, the gas is discharged from the air outlet. The cooperation of the air-heating component and the steam heating component provides double heating and thawing for the gas conveying pipe, which improves the heating and thawing efficiency and enhances the practicality of the heating and thawing device for liquefied natural gas pipelines. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a heating and defrosting device for a liquefied natural gas pipeline proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the steam heating component of a heating and defrosting device for a liquefied natural gas pipeline proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the air-heated component of a heating and defrosting device for a liquefied natural gas pipeline proposed in this utility model.

[0020] Legend:

[0021] 1. Delivery pipe; 2. Valve; 3. Steam heating component; 4. Air heating component; 31. Water tank; 32. Water pump; 33. Water outlet pipe; 34. Spray head; 35. Drain pipe; 36. Water seepage filter; 37. Insulation cavity; 38. Heating wire; 41. Mounting cavity; 42. Motor; 43. Fan; 44. Heating mesh; 45. Air outlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-3This utility model provides an embodiment of a heating and defrosting device for a liquefied natural gas (LNG) pipeline, comprising a conveying pipe 1, a valve 2 fixedly connected to the surface of the conveying pipe 1, opening the valve 2 to allow LNG to pass through the conveying pipe 1, a steam heating component 3 provided on the surface of the conveying pipe 1 for heating and defrosting the LNG, and a wind-heating component 4 provided at the top of the conveying pipe 1 for dual heating and defrosting of the LNG. The steam heating component 3 includes a water tank 31 fixedly installed at the top of the conveying pipe 1, a water pump 32 fixedly connected to the side wall of the water tank 31 for pumping and conveying, and a water outlet pipe 33 fixedly connected to the output end of the water pump 32 for pumping water into the water outlet pipe 33. The surface of the water outlet pipe 33 is provided with at least one spray head 34 for spraying heated water onto the surface of the conveying pipe 1. A drain pipe 35 is fixedly connected to the top of the water tank 31, and a seepage filter screen 36 is fixedly connected to the top of the drain pipe 35 for use. The sprayed water passes through the seepage filter screen 36 to reach the lower... Water pipe 35 leads back to water tank 31. A heat insulation cavity 37 is fixedly connected to the surface of the seepage filter screen 36, providing insulation around the delivery pipe 1. A heating wire 38 is fixedly connected inside water tank 31, heating the water in tank 31. Water pump 32 penetrates the side wall of water tank 31, and outlet pipe 33 is fixedly connected to the side wall of water tank 31, fixing the positions of water pump 32 and outlet pipe 33. Downpipe 35 penetrates the heat insulation cavity 37 and is fixedly connected to it. At the bottom of 37, water is reused. An insulation film is installed inside the insulation cavity 37 to insulate the delivery pipe 1. The water outlet pipe 33 passes through the two side walls of the insulation cavity 37 and is fixedly connected inside the insulation cavity 37. Multiple spray heads 34 are located directly below the delivery pipe 1 and inside the insulation cavity 37. The insulation cavity 37 is fixedly connected to the surface of the delivery pipe 1. The insulation cavity 37 insulates the area around the delivery pipe 1 to prevent a large amount of heat from the sprayed water from leaking out and affecting the heating and defrosting efficiency.

[0024] Reference Figures 1-3 The air-heating component 4 includes a mounting cavity 41 fixedly connected to the top of the insulation cavity 37. A motor 42 is fixedly connected inside the mounting cavity 41. The motor 42 is fixedly connected to the mounting cavity 41. A fan 43 is fixedly connected to the output end of the motor 42. A heating mesh 44 is provided at the bottom of the fan 43. When the motor 42 is turned on, it drives the fan 43 to rotate, and the heat generated by the heating mesh 44 is transported to the inside of the insulation cavity 37. An air outlet 45 is opened on the surface of the insulation cavity 37. The heating mesh 44 is fixedly connected inside the mounting cavity 41 to perform a second heating and defrosting of liquefied natural gas, thereby improving the heating and defrosting efficiency.

[0025] Working principle: Opening gas valve 2 allows liquefied natural gas to pass through delivery pipe 1. When heating and thawing the liquefied natural gas, heating wire 38 is heated, which heats the water in water tank 31. The heated water is drawn by water pump 32 and enters water outlet pipe 33. The water reaches spray head 34, which sprays the heated water onto the surface of delivery pipe 1 to heat and thaw the liquefied natural gas in delivery pipe 1. After the sprayed water is used, it passes through seepage filter screen 36 to drain pipe 35 and returns to water tank 31 for reuse. Insulation chamber 37 insulates the area around delivery pipe 1 to prevent a large amount of heat from the sprayed water from leaking out. At the same time, heating mesh 44 is heated. Motor 42 is turned on to drive fan 43 to rotate, transferring the heat generated by heating mesh 44 into the insulation chamber 37 to heat and thaw the liquefied natural gas. Finally, the gas is discharged through air outlet 45.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A warming and thawing device for liquefied natural gas pipelines, comprising a transport pipe (1), characterized in that: The valve (2) is fixedly connected to the surface of the conveying pipe (1), the steam warming assembly (3) is arranged on the surface of the conveying pipe (1), and the air heating assembly (4) is arranged on the top of the conveying pipe (1); The steam warming assembly (3) comprises a water tank (31) fixedly arranged on the top of the conveying pipe (1), a water pump (32) fixedly connected to the side wall of the water tank (31), a water outlet pipe (33) fixedly connected to the output end of the water pump (32), not less than one spray head (34) arranged on the surface of the water outlet pipe (33), a drain pipe (35) fixedly connected to the top of the water tank (31), a water seepage filter screen (36) fixedly connected to the top of the drain pipe (35), a heat preservation cavity (37) fixedly connected to the surface of the water seepage filter screen (36), and a heating wire (38) fixedly connected to the inside of the water tank (31).

2. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The air heating assembly (4) comprises an installation cavity (41) fixedly connected to the top of the heat preservation cavity (37), a motor (42) fixedly connected to the inside of the installation cavity (41), a fan (43) fixedly connected to the output end of the motor (42), a heating net (44) arranged on the bottom of the fan (43), and an air outlet (45) formed in the surface of the heat preservation cavity (37).

3. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The water pump (32) penetrates through the side wall of the water tank (31), and the water outlet pipe (33) is fixedly connected to the side wall of the water tank (31).

4. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The drain pipe (35) penetrates through the heat preservation cavity (37) and is fixedly connected to the bottom of the heat preservation cavity (37), and the heat preservation film is arranged in the inside of the heat preservation cavity (37).

5. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The water outlet pipe (33) penetrates through the side walls of the heat preservation cavity (37) and is fixedly connected to the inside of the heat preservation cavity (37).

6. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The plurality of spray heads (34) are located directly below the conveying pipe (1) and in the inside of the heat preservation cavity (37).

7. A warming and thawing device for liquefied natural gas pipelines according to claim 2, characterized in that: The heating net (44) is fixedly connected to the inside of the installation cavity (41).

8. A warming and thawing device for liquefied natural gas pipelines according to claim 1, characterized in that: The heat preservation cavity (37) is fixedly connected to the surface of the conveying pipe (1).

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